ELECTROHYDRAULIC DRIVE FOR PUMPS E.G. ARTIFICIAL HEARTS

摘要

primary fluid operated system and secondary fluid propulsion that can be used, for example, as a device for implantable artificial heart comprising a unidirectional pump for pumping the electrorheological fluid, two loop return conduits connected to the pump and for each return line, two electrorheological valves placed inside said conduits in series flow and a primary fluid actuated device and a secondary fluid propulsion connected to said loop at a location between the two electrorheological valves. The actuating devices by primary fluid and secondary fluid propulsion may comprise a chamber whose interior is divided by a flexible diaphragm transmitting pressure to a first cavity for receiving the electrorheological fluid of this feedback loop and a second cavity for to propel the secondary fluid. The electrorheological valves are actuated to pressurize a first cavity while emptying the other and vice versa. In the version of the present invention intended for cardiac support pump, the actuating device by primary fluid and to propel the secondary fluid is replaced, for example, by a flexible container, placed inside the body cavity, the operation is used to transmit the fluid pressure within the cavity.